Improvement in diaphragm stop-cocks



einem saar tent @i WILLIAM n. BA NATA, o r rsr R 1 N er1 non,

Letters Patent No, 107,852, dated October 4, 1870.

- .IMPRovl-:ME'NT IN DIAPHRAGM s'rpP-coKs.

` 'lv'he Schedule referred te in these Letters Patent and making part ofthe same.

' 4 V Similar-letters of reference, where they occur in the separatefigures, denote'like parts of' the stop-cock in bothtofthemn Y `1 amaware that diaphragm-cocks have been-made andused, but the diaphragms,so far as I `know or can learn, were made oi" rubber, canvas, orleather, andwere, moreover, placed inside of and under the cap ofthestop-cock; and these diaphragnis were either-auxiliary to` the metalplug or valveused, or

else, when operating` as a valve or cut-orf, required the use of` anauxiliary spring to make them 'work efiiciently.` -Sucli diaphragm-cocksIV lay no claim `to.

'lhey aretoo expensive, complicated, and difiicult to' keep in goodworking order, and not, from the nature of the materialfused; suitable`for such liquids or gases as contained acids,by which they Vwererot-ted. decomposed, or destroyed." f

My invention consists in a flexible or elastic metali lic diaphragm,applied; erternallygso as -to bccasily and cheaply made orfrcpaired,andV exempt from leak-y age, as the diaphragm isfor may bc soldered tothe -body ofthecock, or have s'uchmetallic connect-ion as to leavenojoint where `leakz'tge' could possibly occur,

as vit would with rubber,y canvas. lea-ther, and such likediaphragms'that are pinched down at the edges by a screw-cap. f l Toen'aflc others skilled in the art to make and use myinvention I willproceed to describe the saine withQreference'to.thedrawing Thebody ofthestop-cock is represented at A, 'and the inlet-passage into said body atc.

This inlet-passage@ is firstv horizontal, and then rises vertically andissues througha nozzleor projection, c, which terminatcsin a chamber, e.

From this chamber e the exit or escape-passage i descends, firstvertically, then horizontally, to its issue or connection with a pipescrewed into the body at m.

Over the chamber e there'is'soldered, or otherwise securely fastened, athin and flexible diaphragm, n, ot'

steel, or other elastic or s'pringy metal, that coln. pletcly inclosessaid chamber, so that it 'has novconucction with any but the inlet andexit-passages of the cock.

On thehody of the cock there is cast, or otherwise made and fastened, abail, bracket, or arm, f, through which a set-screw, o, passes, and thepoint r of which may bear` upon or in a seat, s, on said diaphragm n, sothat, by turning said screw o, the diaphragm may. be pressedclown uponthe. nozzle orprojection c, and tightly cl`e the inlet-passage a. W'henthe screw is turned the other way, the elasticity of the metaldiapl'iragin springs itaivay from said projection and' inlet-passage,and allows the liquid or gas to pass through. The chamber e,communicating only with the inlet and exit-issues, cannot. leak, asthere is no joint through which there could be any leak.

The inner side of `the diaphragm, and that portion of it' which pressesupon the projection c, may be coated with some softer metal oralloy thanthat of the diaphragm itself, so as to form a metallic packing over thepassage through the cock.

Havingthus fully described my invention.

In combination with the body of a stop-cock, a spring metal diaphragm,externally applied thereto,

forming' a cover to the interior parts,fand secured to the' periphery ofthe body, or exterior, so that, by the ae-tion of the thumb-screw', itmay be made to close and open the passage through the cock,substantially as and for the purpose described.

WM. E. BASTA.

Witnesses: 4SALEM T. LAMB,

JOHN RALLEX. l

